Transmission of Gamma Radiation through Shields

This section of our resource presents broad beam transmission data for gamma rays and bremsstrahlung (where appropriate) from radioactive materials. Most of this data is taken from the BS 4094 standard (and then featured in the Handbook of Radiological Protection). The density of materials is as follows: brick (1.6), concrete (2.35), and barytes bricks (3.2). For some radionuclides other materials are also specified as: aluminium (2.7), iron (7.9), lead (11.3) and uranium (19). In all these materials the density is referenced to water (i.e. 1 g/cm³). As noted for all resource in this Ionactive presentation, the data is presented for historical interest only. That said, the reader will be interested to know that much of this data is used today in radiation shielding calculations.